Question

Un ''pistol'' cu resort de constanta de elasticitate =500N/m se ''incarca'' prin comprimarea acestuia pe distanta de 5cm. Ce viteza capata bila lansata de acest pistol?

Answer 1

$k=500N/m \\ x=0,05m \\ \\ \dfrac{kx^2}{2}=\dfrac{mv^2}{2} \\ \\ \Rightarrow v=x\sqrt{\dfrac{k}{m}}.$